:root{--blue:#3f8fe5;--blue-dark:#245f9e;--ink:#16283c;--text:#43566a;--muted:#718296;--line:#dce7f2;--pale:#f5f8fc;--pale2:#edf4fb;--tag:#eaf4ff;--footer:#163f69;--shadow:0 16px 42px rgba(42,93,145,.10);--radius:22px;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.75;background:#fff;overflow-x:hidden}body.menu-open{overflow:hidden}a{color:var(--blue-dark);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto;display:block}button,a{touch-action:manipulation}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:12px;top:-60px;z-index:9999;background:#fff;padding:10px 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solid var(--line);border-radius:16px;background:#fff}.article-toc strong{display:block;color:var(--ink);margin-bottom:8px}.article-toc a{display:block;padding:7px 9px;border-left:2px solid transparent;color:var(--muted)}.article-toc a.is-active{color:var(--blue-dark);border-left-color:var(--blue);background:var(--pale)}.mobile-toc{display:none;margin-bottom:24px;border:1px solid var(--line);border-radius:12px;padding:0 14px}.mobile-toc summary{min-height:48px;display:flex;align-items:center;font-weight:700;color:var(--ink)}.mobile-toc a{display:block;padding:8px 0}.notice{padding:18px 20px;border-left:4px solid var(--blue);background:var(--pale2);border-radius:0 12px 12px 0;margin:24px 0}.risk-box{padding:22px;border:1px solid #cfe0ef;background:#f8fbfe;border-radius:16px}.related-links{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.related-links a{padding:14px;border:1px solid var(--line);border-radius:10px;color:var(--ink)}.center-hero{padding:64px 0}.center-hero .container{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}.center-hero h1{font-size:clamp(38px,5vw,60px);line-height:1.08;color:var(--ink)}.center-kicker{font-weight:800;color:var(--blue-dark)}.center-visual{min-height:310px;border-radius:30px;background:var(--pale2);display:grid;place-items:center;padding:30px}.center-visual img{max-height:260px}.center-visual.text-visual{padding:36px;display:block;background:var(--ink);color:#eaf4ff}.center-visual.text-visual strong{font-size:42px;color:#fff;display:block}.topic-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.topic{border:1px solid var(--line);border-radius:18px;padding:24px}.topic h3{color:var(--ink)}.metric-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.metric-row div{padding:22px;background:var(--pale);border-radius:16px}.metric-row 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